A magnetic core with an air gap is shown below. For a relative permeability is 3500, and the space free permeability is 4pix10^-7 H/m. Find the reluctance of the left leg and the top side of the core. Ignore the gap in your calculations.
Find attached picture

Select one:
a. Rleft = 1251 A. t./Wb , Rtop = 1023 A. t/
Wb
b. None
c. Rleft = 12.51 KA. t./Wb , Rrop = 10.23 KA. t/Wb
d. Rleft = 125.1 A. t./Wb , Rtop = 102.3 A. t/Wb​